function it_should_create_an_extended_grammar_from_a_node()
{
$grammarNode = new GrammarNode('FooFile', array(new RuleNode('Foo', '"Foo"', new RuleReferenceNode('Bar'))));
$grammarNode->setNamespace('Acme\\Factory');
$grammarNode->setImports(array('Acme\\FactoryInterface', 'Acme\\BaseFile'));
$grammarNode->setBase('BaseFile');
$grammarCode = <<<EOS
namespace Acme\\Factory;
use Acme\\FactoryInterface;
use Acme\\BaseFile;
class FooFile extends BaseFile
{
protected function parseFoo()
{
\$_position = \$this->position;
if (isset(\$this->cache['Foo'][\$_position])) {
\$_success = \$this->cache['Foo'][\$_position]['success'];
\$this->position = \$this->cache['Foo'][\$_position]['position'];
\$this->value = \$this->cache['Foo'][\$_position]['value'];
return \$_success;
}
\$_success = \$this->parseBar();
\$this->cache['Foo'][\$_position] = array(
'success' => \$_success,
'position' => \$this->position,
'value' => \$this->value
);
if (!\$_success) {
\$this->report(\$_position, "Foo");
}
return \$_success;
}
}
EOS;
$grammarNode->accept($this->getWrappedObject());
$this->getResult()->shouldBe($grammarCode);
}
public function visitGrammar(GrammarNode $node)
{
$result = '';
if ($node->getNamespace() !== null) {
$result .= "namespace {$node->getNamespace()};\n\n";
}
if (count($node->getImports()) > 0) {
foreach ($node->getImports() as $import) {
$result .= "use {$import};\n";
}
$result .= "\n";
}
if ($node->getBase() === null) {
$result .= <<<EOS
class {$node->getName()}
{
protected \$string;
protected \$position;
protected \$value;
protected \$cache;
protected \$cut;
protected \$errors;
protected \$warnings;
EOS;
} else {
$result .= <<<EOS
class {$node->getName()} extends {$node->getBase()}
{
EOS;
}
$pieces = $this->getResults($node->getLength());
foreach ($pieces as $piece) {
$result .= <<<EOS
{$this->indent($piece)}
EOS;
}
if ($node->getStartSymbol() !== null) {
$result .= <<<EOS
private function line()
{
if (!empty(\$this->errors)) {
\$positions = array_keys(\$this->errors);
} else {
\$positions = array_keys(\$this->warnings);
}
return count(explode("\\n", substr(\$this->string, 0, max(\$positions))));
}
private function rest()
{
return '"' . substr(\$this->string, \$this->position) . '"';
}
protected function report(\$position, \$expecting)
{
if (\$this->cut) {
\$this->errors[\$position][] = \$expecting;
} else {
\$this->warnings[\$position][] = \$expecting;
}
}
private function expecting()
{
if (!empty(\$this->errors)) {
ksort(\$this->errors);
return end(\$this->errors)[0];
}
ksort(\$this->warnings);
return implode(', ', end(\$this->warnings));
}
public function parse(\$_string)
{
\$this->string = \$_string;
\$this->position = 0;
\$this->value = null;
\$this->cache = array();
\$this->cut = false;
\$this->errors = array();
\$this->warnings = array();
\$_success = \$this->parse{$node->getStartSymbol()}();
if (\$_success && \$this->position < strlen(\$this->string)) {
\$_success = false;
\$this->report(\$this->position, "end of file");
}
if (!\$_success) {
throw new \\InvalidArgumentException("Syntax error, expecting {\$this->expecting()} on line {\$this->line()}");
}
return \$this->value;
}
EOS;
}
$result .= <<<EOS
}
EOS;
$this->results[] = $result;
}
function it_should_parse_extended_grammars()
{
$tree = new GrammarNode('ExtendedFile', array(new RuleNode('Foo', "'Foo'", new LiteralNode('"foo"', false))));
$tree->setBase('BaseFile');
$this->parse('grammar ExtendedFile extends BaseFile { Foo = "foo"; }')->shouldBeLike($tree);
}
private function createClassFromTree(GrammarNode $tree)
{
$visitor = new ToClassVisitor();
$tree->accept($visitor);
return $visitor->getResult();
}
protected function parseGrammar()
{
$_position = $this->position;
if (isset($this->cache['Grammar'][$_position])) {
$_success = $this->cache['Grammar'][$_position]['success'];
$this->position = $this->cache['Grammar'][$_position]['position'];
$this->value = $this->cache['Grammar'][$_position]['value'];
return $_success;
}
$_value27 = array();
if (substr($this->string, $this->position, strlen("grammar")) === "grammar") {
$_success = true;
$this->value = substr($this->string, $this->position, strlen("grammar"));
$this->position += strlen("grammar");
} else {
$_success = false;
$this->report($this->position, '"grammar"');
}
if ($_success) {
$_value27[] = $this->value;
$_success = true;
$this->value = null;
$this->cut = true;
}
if ($_success) {
$_value27[] = $this->value;
$_success = $this->parse_();
}
if ($_success) {
$_value27[] = $this->value;
$_success = $this->parseIdentifier();
if ($_success) {
$name = $this->value;
}
}
if ($_success) {
$_value27[] = $this->value;
$_position18 = $this->position;
$_cut19 = $this->cut;
$this->cut = false;
$_value17 = array();
$_success = $this->parse_();
if ($_success) {
$_value17[] = $this->value;
if (substr($this->string, $this->position, strlen("extends")) === "extends") {
$_success = true;
$this->value = substr($this->string, $this->position, strlen("extends"));
$this->position += strlen("extends");
} else {
$_success = false;
$this->report($this->position, '"extends"');
}
}
if ($_success) {
$_value17[] = $this->value;
$_success = $this->parse_();
}
if ($_success) {
$_value17[] = $this->value;
$_success = $this->parseIdentifier();
if ($_success) {
$base = $this->value;
}
}
if ($_success) {
$_value17[] = $this->value;
$this->value = $_value17;
}
if (!$_success && !$this->cut) {
$_success = true;
$this->position = $_position18;
$this->value = null;
}
$this->cut = $_cut19;
}
if ($_success) {
$_value27[] = $this->value;
$_success = $this->parse_();
}
if ($_success) {
$_value27[] = $this->value;
if (substr($this->string, $this->position, strlen("{")) === "{") {
$_success = true;
$this->value = substr($this->string, $this->position, strlen("{"));
$this->position += strlen("{");
} else {
$_success = false;
$this->report($this->position, '"{"');
}
}
if ($_success) {
$_value27[] = $this->value;
$_position21 = $this->position;
$_cut22 = $this->cut;
$this->cut = false;
$_value20 = array();
$_success = $this->parse_();
if ($_success) {
$_value20[] = $this->value;
if (substr($this->string, $this->position, strlen("start")) === "start") {
$_success = true;
$this->value = substr($this->string, $this->position, strlen("start"));
$this->position += strlen("start");
} else {
$_success = false;
$this->report($this->position, '"start"');
}
}
if ($_success) {
$_value20[] = $this->value;
$_success = true;
$this->value = null;
$this->cut = true;
}
if ($_success) {
$_value20[] = $this->value;
$_success = $this->parse_();
}
if ($_success) {
$_value20[] = $this->value;
$_success = $this->parseRule();
if ($_success) {
$startSymbol = $this->value;
}
}
if ($_success) {
$_value20[] = $this->value;
$this->value = $_value20;
}
if (!$_success && !$this->cut) {
$_success = true;
$this->position = $_position21;
$this->value = null;
}
$this->cut = $_cut22;
}
if ($_success) {
$_value27[] = $this->value;
$_value25 = array();
$_cut26 = $this->cut;
while (true) {
$_position24 = $this->position;
$this->cut = false;
$_value23 = array();
$_success = $this->parse_();
if ($_success) {
$_value23[] = $this->value;
$_success = $this->parseRule();
if ($_success) {
$rule = $this->value;
}
}
if ($_success) {
$_value23[] = $this->value;
$this->value = $_value23;
}
if ($_success) {
$this->value = call_user_func(function () use(&$name, &$base, &$startSymbol, &$rule) {
return $rule;
});
}
if (!$_success) {
break;
}
$_value25[] = $this->value;
}
if (!$this->cut) {
$_success = true;
$this->position = $_position24;
$this->value = $_value25;
}
$this->cut = $_cut26;
if ($_success) {
$rules = $this->value;
}
}
if ($_success) {
$_value27[] = $this->value;
$_success = $this->parse_();
}
if ($_success) {
$_value27[] = $this->value;
if (substr($this->string, $this->position, strlen("}")) === "}") {
$_success = true;
$this->value = substr($this->string, $this->position, strlen("}"));
$this->position += strlen("}");
} else {
$_success = false;
$this->report($this->position, '"}"');
}
}
if ($_success) {
$_value27[] = $this->value;
$this->value = $_value27;
}
if ($_success) {
$this->value = call_user_func(function () use(&$name, &$base, &$startSymbol, &$rule, &$rules) {
$rules = array_merge(isset($startSymbol) ? array($startSymbol) : array(), $rules);
$grammar = new GrammarNode($name, $rules);
if (isset($base)) {
$grammar->setBase($base);
}
if (isset($startSymbol)) {
$grammar->setStartSymbol($startSymbol->getIdentifier());
}
return $grammar;
});
}
$this->cache['Grammar'][$_position] = array('success' => $_success, 'position' => $this->position, 'value' => $this->value);
if (!$_success) {
$this->report($_position, 'Grammar');
}
return $_success;
}